Rear mounted implement for tractors



Jan. 20, 1953 A. G. BUHR REAR MOUNTED IMPLEMENT FOR TRACTORS 2 SHEETS-SHEET 1 Filed March 28, 1949 Jan. 20, 1953 A. G. BUHR REAR MOUNTED IMPLEMENT FOR TRACTORS 2 SHEETS-SI-IEET 2 Filed March 28, 1949 Patented Jan. 20, 1953 REAR MOUNTED IMPLEMENT FOR TRACTORS August G. Buhr, La Crosse, Wis., assignor to Allis- Ghalmers Manufacturing Company, Milwaukee, Wis., a corporation of Delaware Application March 28, 1949, Serial No. 83,818

Claims. 1

This invention relates generally to tractor mounted implements and is more particularly concerned with and has as an object the provision of an improved tractor-implement combination incorporating features of construction and arrangement affording an effective support for rear mounted tools, more especially track eradicators, affording adequate protection for the tractor power plant or other damageable tractor parts positioned between the rear traction means and rearwardly of the axle structure supporting same and/or affording ready access to a drawbar structure positioned in underlying relation to the above mentioned damageable parts.

The construction and operation of an illustrative apparatus embodying the invention will become readily apparent as the disclosure progresses and particularly points out those features considered of special importance. And accordingly. the present invention may be considered as comprising the various constructions and/or combinations hereinafter more fully set forth in the detailed description and appended claims, reference being had to the accompanying drawing of an illustrative apparatus, in which:

Fig. 1 is a plan view of the rear portion of a tractor-implement combination embodying the invention;

Fig. 2 is a side view of the apparatus shown in Fig. 1 with parts broken away to better show the implement frame supports;

Fi 3 is a rear view of the apparatus shown in Fig. 2; and

Fig. 4 is a detail showing of the lift and positioning mechanism.

Referring to Figs. 1-3, inclusive. it will be seen that the tractor portion of the combination comprises generally a rear housing structure I including laterally extending portions 2 rotatably supporting a pair of driving axles 3 mounting a pair of laterally spaced ground engaging tractor wheels 5 at opposite ends thereof, an engine 6 carried by housing structure I in rearwardly extending relation thereto and drivingly connected to axles 3 by conventional means including a change speed gearing and differential mechanism (not shown), and a stub frame member I extending forward from the central portion of housing I and mounting an operators seat or station 8 in elevated relation thereto immediately in advance of engine 8. The forward portion of the tractor may be of any suitable design and is not shown in the accompanying drawings since a disclosure thereof isvbelieved unnecessary for a complete understanding of the present invention.

Tractor engine 6 includes a lower housing portion I0 preferably in the nature of a metal casting which has integrally formed therewith at the forward end of the housing a pair of lugs II which project laterally therefrom. Lugs II are essentially attaching pads and each includes a pair of vertically aligned threaded bores (not shown) adapted to receive cap screws I2 or the like. A pair of L-shaped strap members I3 and I4 are detachably secured at either side of the engine housing to lugs I I by cap screws I2, and it will be noted (Fig. 1) that the forwardly extendingpart of straps I3 and I4 are bent outwardly from enginehousing ID. A combination implement frame and bumper structure in the form of a generally U-shaped frame member or yoke I5, disposed in protective relation to the rear end and sides of engine housing II], is detachably connected at the forward end portion of each of its legs to the forward end of L-shaped strap members I3 and 4. as by bolts It, for pivotal movement relative thereto.

For selectively positioning yoke I5 relative to engine housing I B for movement about the transverse pivot axis afforded by bolts I6 there is provided a lift means comprising a lever and quadrant structure I1 and a lift rod I8. More specifically. in addition to L-shaped member I3 cap scre s I2 also fixedl secure a ratchet part 20 to attaching pad I I at the right side of engine housing I0, and a lever 2| is pivotallv mounted on upper cap screw I2 in side abutting relation to the ratchet or ouadrant 20. The lo er end of lever 2| includes a rearwardly extending integral part comprising lift arm I9 hich is additionally braced by a gu set strap 22 or the like. For securing lever 2|, and consequently lift arm I9, in any selected vertical position there is provided a detent mechanism comprising a hand rip 23, a latch rod 25, a plunger guide box 26. and a plunger 21 adapted for engagement with any one of the notched portions of ratchet 20. As is customary in this type of detent mechanism a spring (not shown) is provided in plunger guide box 26 to constantly urge plunger 21 in a downward direction and upon movement of hand grip 23 toward lever 2 I, latch rod 25 acts against such spring to move plunger 21 out of engagement with ratchet 20 thereby affording free pivotal movement of lever 2| about the pivot axis afforded by upper cap screw I2. A balance spring *28 is connected at one end to a bracket 29, carried by the upper portion of lever 2|, and at the other end to a bracket 35 carried by pivot bolt I 6 to assist the operator in moving lever 2| forward. Looking particularly at Fig. 4, it will be seen that the rearmost portion of lift arm is has pivotally attached thereto a trunnion as havin aligned openings (not shown) through the laterally projecting side portions thereof. Lift rod i3 is slidably positioned t rough the aligned. openings in' trunnion 3d and a cotter pin 3 l, or the like, through the upper end portion of rod i8 limits downward movement thereof relative to trunnion 30. The lower end of lift rod i is bent outwardly at right angles to the main portion-of the rod (see.

' rod 18, and the lower surface or trunnion For mounting tools on yoke i5 rearward of the tractor, particularly ground engaging tools for loosening the earth packed by the weight of traction wheels 5, there is provided a pair of similar frame members 3?, generally L-shaped, adapted for longitudinally adjustable fixed connection with the leg portions of yoke l5 (Fig. l). Spe cifically, one leg portion 38 of each frame member 31 is positioned in side abutting relation to one 7 leg of yoke l5 and is selectively positioned therealong by any suitable clamping means such as the illustrated straps w and bolts 4!. The other 7 leg d2 of each L-shaped bar or frame member 3? projects laterally away from yoke l5 and affords a mounting means for selectively positioning shovels G3, or other similar tools, therealcng in fixed relation to the bar. And in this connection it will be noted that leg 42 may be made of any length to thereby provide for mounting more than one tool thereon and, also, to permit shiftin the 7 tool or tools to conform with any selected tread width spacing of ground engaging tractor wheels 5. In addition, it will be noted that the length of legs 38 and 42 may be different as shown, and

that either leg may be selectively secured. in side abutting relation to yoke to thereby change the effective length of the tool supporting or free portion thereof.

In Figs. 2 and 3 it will be seen that the drawbar structure mounted on the tractor for pulling implements in trailing relation thereto comprises an elongated member 45 fixed at one end to the underside of the forward portion of housing iii,

as by bolt ll, for pivotal movement about a gen erally vertical axis and a bail til secured to the rear end of housing for supporting the free end of drawbar 46. And in this connection it will be noted that when the tools are in their ground engaging position (as shown in Figs. 2 and 3) frame parts [5 and 3? are above the level of drawbar as and, therefore, in noway interfere with the normal use of the drawbar. Also it will be noted (see Fig. 1) that the U-shaped member or yoke i5 presents generally parallel side portions disposed in proximate protective relation to the opposite sides of the power plant 8, and that these side portions of the yoke are united by a rearwardly bowed portion disposed in similar protective'relation to the rear portion of said power plant.

Thus it should be obvious from the foregoing description that apparatusccnstructed in accordance with the present-invention afiords a vertiacaaeeo this invention are of more generai cally movable support for rear mounted tools 43 which also provides protection for damageable parts, such as engine 6, located at the re r of the and yet permits free use of, and ready access to, the drawbar Alt; And although shown and described as having particular utility when applied to a tractor having an engine mounted in the rear it is apparent that certain ieatures of application and that, therefore, it is not intended to limit the invention to the exact constructions and combinations herein disclosed as various modifications within the scope or the appended claims may occur to persons skilled in the art.

It is claimed and desired to secure by Le Patent:

1. In a tractor having a wide rear axl structure supported on a pair of traction means mounted on said axle st ucture adja opposite ends thereof, having a power plant mounted between said traction means in l rwardi relation to said structure, structure operatively disposed bet traction means and in underlying relation to said power plant, the combination of implement frame and bumper structure comprising a gen eraliy ll-shaped part supported in proximate protective reiation'with respect to the rear and opposite side'portions of said power plant'through 'nieans affording vertical swinging niovenient'oi aid part about a transverse axis adjacent said -c structure, a pair of similar L-shaped bars having selected sides thereof detachaciy secured toopposite side portions of said U-shaped part for adjustment therealong and positioned with their other sides projecting laterally outi d to the rear of said traction means, tools mounted on said other sides or" said LSh&13d bars for adjustm nt longitudinally thereof, and means for V61tl6e adjusting said U=shaped part to selectively position said tools in operative or nonope relation to the ground, said U-shaped part being pro tectively associated with said power plant throughout the range of vertical adjustment.

2. In a tractor having a wide rear axle struo ture supported on a pair of traction means n1ounted on said axle structure adjacent opposite sides thereof, and having a power plant mounted between said traction means in rearwardly estending relation to said aisle structure and projecting beyond the rear of the former, the combination of an implement frame and bumper structure comprising a generally Ushaped part supported in prox'nnate protective relation with respect to the rear. and opposite side portions or said power plant through means affording vertical swinging niov ent of said part about a tr.nsverse axis adjacent said axle structure, a pair of L shaped bars having selected sides thereof detachably secured in side abutting relation to opposite side portions of said U-shaped part for adjustment thele l longitudinally of the tractor with their other sides projecting laterally outward to the rear of said traction means, tools mounted on the outwardly projecting sides'of'said L-shapcd parts for adjustment therealong laterally of the direction of travel, and means for vertically adjusting said Li -shaped part for selectively positioning said tools in operative or nonoperative relation to the ground, said U-shaped part being protectively associated with said power plant throughout the range of vertical adjustment.

3.In a tractor having a wide rear axle structure supported ona pair of traction niean's mounted on said axle structure adjacent opposite sides thereof, having a power plant mounted between said traction means in rearwardly extending relation to said axle structure and projecting beyond the rear of the former, and having a drawbar structure operatively disposed centrally of the tractor and in underlying relation to said power plant, the combination of an implement frame and bumper structure comprising a generally U- shaped parttsupported in proximate protective relation with respect to the rear and opposite side portions of said power plant through means affording vertical swinging movement of said part about a transverse axis adjacent said axle structure, a pair of Lshaped bars having selected sides thereof detachably secured in side abutting relation to opposite side portions of said U-shaped part for adjustment therealong longitudinally of the tractor with their other sides projecting laterally outward to the rear of said traction means, tools mounted on the outwardly projecting sides of said L-shaped parts for adjustment therealong laterally of the direction of travel, and means for vertically adjusting said U-shaped part for selectively positioning said tools in operative or nonoperative relation to the ground, said U-shaped part when lowered to a tool working position being above said drawbar structure and thereby rendering same readily connectable with a trail behind implement.

4. In a tractor having a wide rear axle structur supported on a pair of traction means mounted on said axle structure adjacent opposite sides thereof, having a power plant mounted between said traction means in rearwardly extending relation to said axle structure and projecting beyond the rear of the former, and having a drawbar structure operatively disposed centrally of the tractor and in underlying relation to said power plant, the combination of an implement frame and bumper structure comprising a pair of supports carried by opposite forward side portions of said power plant in depending relation thereto, said supports presenting laterally aligned pivot mountings disposed below said axle structure adjacent the rear side thereof and above said drawbar structure, a generally U-shaped part supported on said pivot mountings for vertical swinging movement in proximate protective relation with respect to the rear and opposite side portions of said power plant, a pair of L-shaped bars having selected sides thereof detachably secured to opposite side portions of said U-shaped part for adjustment therealong and positioned on said part with their other sides projecting laterally outward to the rear of said traction means, tools mounted on said other sides of said bars for adjustment therealon laterally of the direction of travel, and means for vertically adjusting said U-shaped part for selectively positioning said tools in operative or nonoperative relation to the ground, said U-shaped part being protectively associated with said power plant throughout the range of vertical adjustment and when lowered to a tool working position being above said drawbar structure thereby rendering same readily connectable with a trail behind implement.

5. In a tractor having a wide rear axle structure supported on a pair of traction means mounted on said axle structure adjacent opposite sides thereof, and having a power plant mounted between said traction means in rearwardly extending relation to said axle structure and projecting beyond the rear of the former, the combination of 6 an implement frame and bumper structure comprising a pair of supports carried by opposite forward side portions of said power plant in depending relation thereto, said supports presenting laterally aligned pivot mountings disposed below and adjacent the rear side of said axle structure, a generally U-shaped part supported on said pivot mountings for vertical swinging movement in proximate protective relation with respect to the rear and opposite side portions of said power plant, a pair of L-shaped bars having selected sides thereof detachably secured to opposite sides of said U-shaped part for adjustment therealong and positioned on said part with their other sides projecting laterally outward to the rear of said traction means, tools mounted on said other sides of said bars for adjustment therealong laterally of the direction of travel, and means for vertically adjusting said U-shaped part to selectively position said tools in operative or nonoperative relation to the ground, said U-shaped part being protectively associated with said power plant throughout the range of vertical adjustment.

6. In a tractor having a wide rear axle structure supported on a pair of traction means mounted on said axle structure adjacent opposite ends thereof, havin damageable parts mounted thereon in rearwardly extending relation to said axle structure, said damageable parts being disposed between side opposed portions of said traction means and projecting beyond the rear thereof, th combination of an implement frame and bumper structure comprising a generally U- shaped part disposed between said traction means and supported on said tractor so as to encompass the rear and opposite sides of said damageable parts in proximate protective relation thereto, said U-shaped part being supported on said tractor through means aiiording vertical swinging movement of said U-shaped part about. a transverse axis adjacent said axle structure, a pair of tool carrying bars independently mounted on opposite sides of said U-shaped part disposed to the rear of said traction means and projectin laterally therefrom, and means for vertically adjusting said U-shaped part to selectively position the tools on said bars in operative and nonoperative relation tothe ground, said U-shaped part encompassing said damageable parts in proximate protective relation thereto throughout the range of said vertical adjustment.

7. In a tractor having a wide rear axle structure supported on a pair of traction means mounted on said axle structure adjacent opposite ends thereof, having damagea'ble parts mounted thereon in rearwardly extending relation to said axle structure, said damageable parts being disposed between side opposed portions of said traction means and projecting beyond the rear thereof, the combination of an implement frame and bumper structure comprising a generally U-shaped part disposed between said traction means and supported on said tractor so as to encompass the rear and opposite sides of said damageable parts in proximate protective relation thereto, said U-shaped part being supported on said tractor through means afiording vertical swinging movement of said U-shaped part about a transverse axis adjacent said axle structure, a pair of L-shaped tool carrying bars with legs of unequal length independently mounted by either leg on opposite sides of said U-shaped part disposed to the rear of said traction means with the free legs of said bars projecting laterally 7 therefrom, and means for vertically adjustin said U-shaped part to selectively position the tools on said bars in operative and nonoperative relation to the ground, said U-shaped part can compassing said damageable parts in proximate protective relation thereto throughout the range of said vertical adjustment.

8. In a tractor having a wide rear axle str cture supported on a pair of traction means mounted on said axle structure adjacent opposite ends thereof, having damageable parts mounted thereon in rearwardly extending relation to said axle structure, said damageable parts being disposed between side opposed portions of said traction means and projecting beyond the rear thereof, the combination of an implement frame and bumper structure comprising a generally U-shaped part disposed between said traction means and supported on said tractor so as to encompass the rear and opposite sides of said dsrnageable parts in proximate protective rela= tion thereto, said U-shaped part being supported on said tractor through means affording vertical swinging movement of said U-shaped part about a tranverse axis adjacent said axle structure, said U-shaped part presenting generally parallel opposed side portions united by a rearwarly bowed portion, a pair of tool carrying bars mounted on said side portions for independent adjustment therealong and projecting laterally outward from opposite sides of said U-shaped part to the rear of said traction means i advance of said bowed portion, and means for vertically adjusting said U-shaped part to scleetively position the tools on said bars in operative and nonoperative relation to the ground, said U-shaped part encompassing the dar -ageable parts in proximate protective reio ion throughout the range of said vertical adjustment.

'9. In a tractor having a wide rear axle structure supported on a pair of traction means mounted on said axle structure adjacent cpposite ends thereof, having a power plant mounted thereon in rearwardly extending relation to said axle structure, said power plant being disposed between side opposed portions of said traction means and projecting beyond the rear thereof. and having a drawbar structure operatively disposed between said traction means and in underlying relation of said power plant, the combination of an implement frame and bumper structure comprising a generally U-shaped part disposed between said tr ction means and supported on said tractor so as to encompass the rear and opposite sides of said power plant protective relation thereto, said U-sheped part extending beyond said drawba-r and 'bei g supported on said tractor through means aliording vertically swinging movement of said U-shaped part about a transverse axis a..- jacent said axle structure, a pair of tool carrying bars independently mounted on opposite sides of said U-shaped part projecting laterally outward therefrom in the rear of said traction means, and means for vertically adjusting said u -shaped part to selectively position the tools on said bars in operative and nonoperative relation to the ground, said U-shaped part when lowered to a tool working position being disposed above said drawbar structure and thereby rendering the latter readily connectable with trail behind implements.

10. In a tractor having a wide rear axle structure supported on a pair of traction means mounted on said axle structure adjacent opposite ends thereof, having a power plant mounted thereon in rearwardly extending relation to said axle structure, said power plant being disposed between side opposed portions of said traction means and projecting beyond the rear thereof, and having a drawbar structure operatively disposed between said traction means and in underlying relation to said power plant, the combination. of an implement frame and bumper struc ture comprising; a generally U-shaped part disposed between said traction means and supported on said tractor so as to encompass the rear and opposite sides of said power plant in proximate p-otective relation thereto, said U-shaped part extending beyond said drawbar and being supported on said tractor through means affording vertical swinging movement of said U-shaped part about a transverse axis adjacent said axle structure, said U-shaped part presenting generally parallel opposed side portions united by a rearwardly projecting bowed por tion, a pair of tool carrying bars mounted on said side portions for independent adjustment therealong and projecting laterally outward from opposite sides of said U-shaped part to the rear of said traction means and in advance of said bowed portion, and means for vertically adjusting said U-shaped part to selectively position the tool on said bars in operative and nonoperative relation to the ground, said U -shaped part when lowered to a tool working position being disposed above said drawbar structure and thereby rendering the latter readily connectable with trail behind implements.

AUGUST G. BUHR.

EITED Ihe following references are of record in the file of this patent:

UNITED STATES PATEITTS Number Date 1,616,999 Williams l, 1927 1,656,773 Burnett Jan. 17, 1928 1,82%,077' Dennis Sept. 22, 1931 1,932,112 Lindgren Oct. 2 1933 2,065,568 Smith June 18, 1935 2,886,378 Wippel Oct. 9, 1945 2,i83,565 Strandlund Oct. 4, 1949 

